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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Authentication;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.BL.Entities;
using Tango.MachineStudio.Common.Authentication;
using Tango.BL;
using Tango.BL.Enumerations;
using System.Data.Entity;
namespace Tango.MachineStudio.UI.Authentication
{
/// <summary>
/// Represents the default Machine Studio <see cref="IAuthenticationProvider">Authentication provider</see>
/// </summary>
/// <seealso cref="Tango.Core.ExtendedObject" />
/// <seealso cref="Tango.MachineStudio.Common.Authentication.IAuthenticationProvider" />
public class DefaultAuthenticationProvider : ExtendedObject, IAuthenticationProvider
{
private User _currentUser;
/// <summary>
/// Gets the current logged-in user.
/// </summary>
public User CurrentUser
{
get { return _currentUser; }
set
{
_currentUser = value;
CurrentUserChanged?.Invoke(this, _currentUser);
RaisePropertyChangedAuto();
}
}
/// <summary>
/// Occurs when the current logged-in user has changed.
/// </summary>
public event EventHandler<User> CurrentUserChanged;
/// <summary>
/// Performs a user login by the specified email and password.
/// </summary>
/// <param name="email">The email.</param>
/// <param name="password">The password.</param>
/// <returns></returns>
/// <exception cref="AuthenticationException">Login failed for user " + email</exception>
public User Login(string email, string password)
{
using (ObservablesContext db = ObservablesContext.CreateDefault())
{
String hash = User.GetPasswordHash(password);
db.Roles.Load();
db.Permissions.Load();
db.RolesPermissions.Load();
User user = db.Users
.Include(x => x.UsersRoles)
.Include(x => x.Organization).SingleOrDefault(x => x.Email.ToLower() == email.ToLower() && x.Password == hash);
if (user == null)
{
throw new AuthenticationException("Invalid credentials for " + email);
}
if (!user.HasPermission(Permissions.RunMachineStudio))
{
throw new AuthenticationException("It seems like you do not have sufficient privileges to run Machine Studio. Please contact your administrator.");
}
if (user != null)
{
user.LastLogin = DateTime.UtcNow;
db.SaveChanges();
}
CurrentUser = user;
return user;
}
}
/// <summary>
/// Logs-out the current logged-in user.
/// </summary>
public void Logout()
{
CurrentUser = null;
}
}
}
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